Improvement in spark-arresters



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F' .1. n 3 1 J wlTNEssEs: E' INVErilToRf` AM, PHara-LnwosMPH/c co. Nymegen/:s mms) UNITED STATES ALONZO W. CRAM, OF LITGHFIELD, ILLINOIS.

IMPROVEMENT IN SPARK-ARRESTERS.

Specification forming part of Letters Patent No. 139,659, dated June 10, 1873; application led October 30, 1872.

To all whom tt may concern:

Be it known that I, ALONZO W. CRAM, of Litcheld, in the county of Montgomery and State of Illinois, have invented a certain Improved Spark-Arrester for Locomotive SmokeStacks, of which the following is a spec' ification:

The first part of my invention consists in combining, with the smoke-stack of a locomotive, an air-funnel, placed above the elevation of the ordinary smokestack, and communicating with an upwardly-bent ilaring pipe discharging the air centrally in the smoke-stack. The second part of my'invention consists in combining with said locomotive smoke-stack an air -chamber, surrounding-its upper end, having upon its front side a funnel-shaped or flaring opening to admit air into the chamber, said chamber having at top an annular opening, from which the air is forced upward around the discharge-openin g of the smokestack. The third part of my invention consists in the combination of a locomotive smoke.- stack, spark-receiver, deflee-tor, gauze diaphragm, annular smoke and air chambers, central air jet, and air-funnel mouth, arranged as described. The fourth part of my invention consists in placing in the contracted top of the stack a number of pivoted plates or deectors, which are so arranged as to direct the smoke, Src., to the leeward side, so as to cause their more ready escape. Thesedeflectors act automatically and simultaneously by means of a V-formed vane, which is placed on a crankarm of one .l of their shafts, said crank being connected by a rod to similar arms on the other shafts,

to insure their simultaneous movement.

Figure 1 is a lon gitudinal vertical axial section. Fig. 2 is a top view.

A is the smoke pipe or stack; B, the spark and dust receiver or chamber, whichmay surround or be arranged at the back of the pipe A, and which is provided with a proper opening, b, for removing the sparks and dust when required. C is a spark-deector, ar ranged in the iiaring or conicalshaped casing A1 of the smoke-stack. Said deflector hasa conical-shaped projecting core, c, to deiiect the sparks, Src., outwardly from over the smoke-pipe A, the flanged rim still further deecting the sparks. c is an annular rim surrounding and supported by the extension part tof the smoke-stack A, said rim supporting the deiiector c by means of rods c'. D is a dished netting or gauze diaphragm, arranged above the deiiector C to prevent the escape of the sparks and dust, and to assist in directing the same into the spark-receiver B. E is a casing or hood, arranged outside of the conical casing A2 of the smoke-stack A. F is a funnel-shaped opening communicating with the annular air-space G formed by the casings A2 and E. His an air pipe or passage, arranged l centrally in the top of the smoke-pipe A, and communicating, by a Haring bend, h, in front, with the annular air-space G and 'unneLOpe-ning F.

When the train is in motion the air will be forced into the air-space G, through the fuunel-shaped opening F, passes up the central pipe or passage H, and also through the annular passage G', and thus the smoke will be forced or drawn up and out of the smoke-pipe A, in an annular body, by the air escaping from the annular passage G and the central passage H. I is a series of plates or deiiectors, pivoted or journaled in the upper part of the hood E, the journals of one side of which are provided with crank-arms t', connected together by a con11ectingrod,t". The lower part of said plates may be made somewhat wider or heavier than the upper part, so that they will tend to regain a vertical .position after being displaced from the same. J is an inclined or wedge-shaped vane, secured to one of the crank-arms t'.

When side Winds are blowing the vane J will tilt or swing the crank-arms t, carrying the plates I, and moveor incline the same in the direction the wind is blowing, and thus the side winds may be utilized to assist in prometing the draft of the smoke stack. When no sidewindsare blowing the plates Iwill again assume' a vertical position. y

In order to operate the plates I by hand either of the j ournal-pins is connected to a rod, t, extending to the enginees cab.

I claim- 1. In combination with the smoke-stack A, the air-funnel F and central air-.Hue H h, ar-

ranged substant-ially as and for the purpose set forth.

2. The combination of the smoke-stack A, chambers A2 and G, air-funnel F, and central air-Hue H 71 substantially as and for the purpose set forth.

3. The combination of the smoke-stack A, dust-receiver B, deector C, gauze diaphragm D, funnel F, chambers A2 and G, and central air-pipe H h, all arranged substantially as set forth.

4. The combination, in a locomotive smokestack, ofthe pivoted deflecting plates I, con nected by the rod i and arms fi, and. arranged to operate automatically by means of a vane, J, substantially as set forth.

ALONZO W. CRAM.

Witnesses:

SAML. KNIGHT, ROBERT BURNS. 

